Bus

You can get into Abu Dhabi from the other emirates by bus. The Emirates Express between Abu Dhabi and Dubai is operated jointly by the Abu Dhabi and Dubai municipalities. The 130-km route takes around two hours and the cost per person is AED20 one way. The first bus departs from the Abu Dhabi main bus terminal on the corner of Hazza bin Zayed the First (11th) Street and East (4th) Road at 6:30 am and the last leaves at 9:30 pm; they leave at 45 minute intervals. From Dubai, the buses leave from 6 am, and run until 9 pm, from the Al Ghubaibah station. For bus times, see the timetable published in the Government of Dubai website.

Taxi

You can flag down any metered taxi on the street in Dubai or any other place in the UAE and ask to go to Abu Dhabi. The cost between Dubai and Abu Dhabi is about AED250. From Abu Dhabi, taxis cost about AED200 to Dubai.

There is no inter-city air or bus service between the seven emirates, so if you don't have your own car the only way to travel between emirates is by service taxi. These can be cramped but they're cheap and a great way to meet locals. The main problem is that they take a while to fill up, except on the main Abu Dhabi-Dubai route. Between these two cities, you also have the choice of slightly cheaper minibuses.

The UAE is one of those countries where having your own wheels can often mean the difference between having fun and spending much of your time planning transport options from A to B. Car rental is only slightly more expensive than in the West, and is relatively easy to arrange in Dubai and Abu Dhabi. Main roads are in pretty good shape and, in theory, you should drive along them on the right. Driving standards are not particularly high and fatalism reigns supreme; if you have the slightest inclination towards self-preservation, be sure to drive defensively - especially at roundabouts.

Only Dubai and Al-Ain have public bus networks useful to travellers. Note that taxis in Abu Dhabi and Al-Ain have meters, as do most in Dubai. The other emirates do not.

There's a daily bus service between Dubai and Muscat in Oman, though the lack of a UAE border post on the road used by the bus can present visa problems for travellers. Regular bus services operate between both Dubai and Abu Dhabi and Saudi Arabia's Eastern Province, though there are no bus or taxi services to Qatar.